Improvement in processes xf  de,corati-ng,tin-plate



A. E. scfimsm" & a. J. m. RADBRUGH.

PEUSB'SS af Decorating Tin Plate.

NQ |63262' P-atentedMayH,1875.

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WITNESSES mar/wa nnnenne, GERMANY,

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ASSIGNORS TO HAMBURG AMERICAN SEWING- MAUHlNE lIKlMPi-iNY, OF SAME PLACE.

il'rlPRQliEidENT lhi FRQCESE$ GF DEC @RATiNG,-TihhPLA iE.

Specification forming part of Letters Patent No. E ii3,2fi2,ldated May 11, 1875; application filed April 5, 1875, 7

To all whom it may con-semi Be it known that we, ALBERT EDWIN Sonmn'r and Gns'rav JACOB MAX RAD- BRUCH, of the city of Hamburg, in the Eur pire of Germany, have invented a new and useful Improvement in the Art of Decorating Tin-Plate, of which the following is a speciti cation: I

This invention relates to the production of what is known as figured or decorated tinplatc, for use in the manu'ihctnre of sheetmetal ware.

The present invention consists, first, in producing the pattern or figure in any desired lor, from silver-whiterto dark gold or tourone, by merely regulating the heat of the stove oven in which the plates are baked, the plates having been previeusly coated with a peculiar varnish or solution containing allianhis, as hereinafter described. The invention consists, secondly, in the process hereinafter specified, considered as a whole, whereby figured or decorated tin-plate can be produced with superior facility and cheapness.

The accompanying drawing represents ten specimens of designs, such as can readily be produced indifferent colors by means of this improved process.

The pattern, design, illustration, view, Writing, or figure to be produced on the tinp'late is first drawn in the i rdinary Way on a lithographic stone. A peculiar paper is prepared with paste, gum, and glycerine, the paper being of the same dimensions as the plate to be decorated. The stone is then prepared with a printing-ink consisting largely of lamprblack, and an impression is then taken upon the transfeupaper. The paper is then placed on the tin-plate,.which already lies close at hand on the printing-press. Paper and plate pass through the machine together, and the pattern becomes transferred to the plate from the paper. The plate is then coated with a particular lacquer, and by this it receives a glazed surface, the paper having been damped with a sponge dipped in water and drawn oft the plate. This paper can be used again.

The transfer-paper is prepared by impreghating it with a mixture consisting of large proportions of paste and glycerine and a small proportion of gum, these three ingredients being thoroughly mixed by boiling. The paper,

after being thus prepared, is hung up to dry,

which is accomplished in a few moments.

After a sufficien't number of plates are printed they areplaced in a large drying stove, which is heated up to 70 Beaumur.

They remain in the same all night, and are color required.

The following is claimed as new in this invention, namely:

1. As auimprovement in the art of decorating tin-plate, coating the surface with a varnish containing alkannin, and subjecting the coated plate to heat, the color of the plate being determined or varied by regulating the heat, substantially 'as herein set forth.

2. The improved process of decorating tinplate, consisting in printing the pattern or figure thereon, coating the printed surface with a varnish containing alkannin, and subjecting the prepared plate to heat otla greater or less degree to produce the desired color of pattern or figure, substantially as herein specified.

Hamburg, 18th of March, 1875.

ALBERT EDWIN SCHMIDT. GUSTAV JACOB MAX RADBRUGH. Witnesses:

HERMANN DORNER, EUGENE Snintr CLAIR on MASSIALE. 

